<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>测试鼠标悬停</title>
</head>
<body>
<table border="1">
    <tr>
        <th>Month</th>
        <th>Savings</th>
    </tr>
    <tr>
        <!-- 这个title就是鼠标自动悬停的 -->
        <td title="January">January</td>
        <td title="$100">$100</td>
    </tr>
</table>
<script type="text/javascript">

</script>
</body>
</html>